No time to print out your boarding pass before going to the airport? Don’t want to wait in line for fellow passengers to figure out the e-ticket kiosks?

American Airlines announced yesterday that it is experimenting with mobile boarding passes, starting now with departing domestic flights from Chicago’s O’Hare Airport. The program will be extended to Los Angeles International Airport and John Wayne Orange County Airport on Monday.

Customers who want the mobile boarding pass must have an Internet-enabled cell phone and a valid e-mail address. Sign in to American’s Web site, AA.com–either via your cell phone or a computer–and select the cell phone boarding pass option. American will send you an e-mail with a barcode that will serve as your boarding pass when going through security and boarding the plane.

If you’re checking bags, you can have American e-mail you a separate barcode that can be scanned at American’s airport kiosks, counters, or curbside check-in.

At this point, American will only send one boarding pass per phone for non-stop, domestic flights on American or American Eagle.

American is working in conjunction with the U.S. Transportation Security Administration (TSA) on the program, and could expand it to additional cities in the coming months if successful.